q=H

[saigorijavolu2k]

When does deltaH = q. I remember hearing that q always deltaH, but the reverse is not true? I am unsure if I heard correctly and why this is so/

[Ashley Wang 4G]

q = ∆H(rxn) if the reaction occurs under conditions of constant pressure, just by the definition of enthalpy change (the heat absorbed/released in a reaction at constant pressure).

[Nathan Rothschild_2D]

I believe you have it switched. deltaH is always q, while q is = to deltaH at constant pressure

[005162520]

I know that q is not always delta H, but it can if it is at constant pressure. But why is delta H always q?

[Alan Cornejo 1a]

Delta H is equal to q when no work is done onto a system, such as a constant pressure